Electrical apparatus.



J. H. LEHMAN.

ELECTRICAL APPARATUS.

APPLICATION FILED DEC. 6. 1912.

Patented June 15, 1915.

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Min-mo: M sa immmgyfiy J. H. LEHMAN.

ELECTRICAL APPARATUS.

APPLICATION FILED DEC. 6. 1912.

1,142,973. Patented June 15, 1915.

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woes: v M 32 iimtowg w UNITED srA'r s PATENT OFFICE.

JOSEPH H. LEHMAN, OF NEW YORK, N. Y.

ELECTRICAL APPARATUS.

To all whom. it may concern:

Be it known that I, JosEPH H. LEHMAN, a citizen of the United States, residing at the borough of Manhattan, city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Electrical Apparatus, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in electrical spark producing apparatus, and is particularly adapted for and is illustrated in the accompanying drawings in its application as an ignition device for internal combustion engines.

Figure 1 is a longitudinal cross section, with parts broken away, of one form of apparatus illustrating an application of my invention. Fig. 2 is an end view looking from right to left at Fig. 1. Fig. 3 is a section on the line 33 of Fig. 1 looking from right to left. Fig. 4L is a section on the line 1-4t of Fig. 1 looking from right to left. Fig. 5 is a longitudinal view. partly broken away, illustrating the combination core and shaft of the apparatus, and Fig. 6 is a cross section of the same on the line 66 looking from right to left.

7 indicates the engine shaft which may be slotted transversely to receive the key 8 which projects from the end of the nut 9 secured to the combination core and shaft by any suitable means such as the screw 10. The key 8, being free to slide within the transverse cut in the end of the shaft 7, allows for any necessary play when the engine shaft and the core of the apparatus are not in true alinement.

11 and 12 indicate the base or support for the apparatus, the upper portions of the same comprising rings which may be drawn together by any suitable means such as the screw 13, and the lower adjacent portions of the same being also adapted to be drawn together by suitable means such as the screw 14.

15 is another ring which may be rigidly secured upon the outer tube or casing 16 of the apparatus and which may be provided with a suitable projection such as 17 so as to facilitate the rotation of the apparatus within its bearings until properly adjusted.

The apparatus may be suitably fastened down upon the frame of the engine by any suitable means such as the bolts 18. The

Specification of Letters Patent. Patented June 15 1915 Application filed December 6, 1912.

Serial No. 735,207.

outer covering or casing of the apparatus 16 preferably comprises a cylinder of suitable insulating material, the rear end of which may be capped or closed by a head of suitable insulating material such as 19 which may be secured, if desired, in any preferred manner and which is provided with a central bore or opening for the passage of the combination shaft and core aforesaid. This combination shaft and core comprises a bunch of soft iron wires 20 secured in parallel arrangement within a suitable tube 21 which is preferably split or provided with a longitudinal cut such as 22 to which further reference will be made hereinafter. Upon the outside of the metallic tube 21 is preferably mounted the insulating tube 23 of fiber or other suitable material and upon this insulating tube is preferably wound the primary coil of my apparatus indicated by the reference character 24. Upon the primary coil is then preferably secured the insulating tubes 2525 upon which the secondary coils are wound, upon which are then placed the tubes HS-26 and the ends of the secondary coils are then closed by suitable rings or plates such as 27. Upon the tubes 26 covering the secondary coils is then preferably placed the condenser 28 which in turn is covered by the outer sheath or covering 16.

The front of the outer cylinder or sheath 16 is closed by the insulating cap or disk 29 which is also provided with a central bore or opening through which the end of the combination shaft and core projects. Outside of the cap 29 it will be observed is mounted the engaging ring 30 which may be suitably secured to the cylinder 16. The front edge of the engaging ring 30 is cut away in three places as indicated by the reference characters 31 to 33 inclusive.

34 is the front or cap of the apparatus and upon the periphery of the same are three enlargements adapted to clear the three cut away portions 31 to 33 inclusive, so that the said cap 34 may be introduced through the front of the engaging ring 30 and after turning the same therein may be suitably retained in position.

35 is a plug or head adapted to fit within the front end of the metallic tube 21 and is provided with a forwarding extending rod which is suitably screw threaded at the end as indicated by the reference character 36 to receive the nut 37.

38 isa cam member carried by the projection 36 and serves as a base for the rotatable member 39 which together with the cam member 38 is mounted upon the projecting member 36, keyed by the pin 35', and is secured thereupon by the said nut 37.

40 is a suitable insulating tube projecting from the face of the plate or disk 27 at the front end of the secondary coil, and is adapted to carry the spring 41 which pro jects the contact point 42.

43 is a suitable metallic ring upon the inside of the rotatable member 39 adapted to contact with the projected contact point 42.

44 is preferably a resilient contacting member suitably secured upon the rotatable member 39, and is electrically connected with the contacting plate 43 upon the other side thereof.

45 to 48 inclusive are contact points and binding posts connected with the spark plugs of the cylinders of the engine and are adapted to contact with the resilient contact member 44 as the rotatable member 39 rotates within the cap 34, the front of the apparatus being provided with a suitable glass such as 49 as shown. An insulating head 29 is also provided with a suitable terminal such as 50 provided with the contact point 51, adapted to contact with the point 52 upon the resilient arm 53, pivoted at 54 and provided with the extension 55 having an insulated bearing face 55 adapted to contact with the extended portions of the face of the cam member 38. From this it will be seen that the resilient member 57 serves normally to keep the contact points 51-52 apart and that as the cam member 38 rotates. these contact points are brought together by the action of the cam upon the projecting member 55-55, but should the resilient member 57 fail to separate the points 5152, the auxiliary arm 56 will be engaged by the extended portions of the face of the cam 38 thereby separating the contact points and they will be brought together again as soon as the projecting mem ber 55-55 is again acted upon by said cam member.

In the operation of my apparatus current enters by the binding post 58 which is insulated from the retaining ring 30 by suitable insulating material such as 59 and which is suitably connected to the primary winding by the connections 60 as shown. After leaving the primary winding the current goes to the terminal 50 by the circuit 61 thus passing through the contact points 51-52, arm 53, spring 57 and engaging ring 30, through the binding post 62 mounted thereupon, back to the other side of the circuit. One side of the condenser 28 is connected to the terminal 50 by the circuit 63, the other side of the condenser being connected to the binding post 62 by the wire 64 which is the ground side of the circuit. From this it will 1 in the secondary windings, one end of which is connected to ground by the wire 64 which terminates in the binding post 62. The sec ondary windings are indicated by the reference characters 65-66 and the current flows to the circuits 64 and 67, the circuit 64 being connected to ground and circuit 67 being connected to the brush or contact plug 42 by the spring 41 from which point the current travels through the annular metallic contact plate 43 through the resilient contacting member 44 which in turn contacts with the binding posts and studs 45 to 48 inclusive, from which points the current is successively distributed to the spark plugs within the cylinders from which points it returns to ground.

Should. the connection to one of the spark plugs become broken or separated so that the spark plug is not in circuit, this fact Wlll be readily indicated through the window or glass 49 in the front of the apparatus. Assuming that the plug of the cylinder connected to the terminal 45, is disconnected, the current will not flow through the contacting spring 44 into the binding post 45 but will jump across the gap between the end of the contacting spring 44 and the nut 37, thus indicating through the glass 49 that the cylinder connected to the binding post 45 is not receiving current.

The binding screw 14 in the basey11-12 or frame support of the coil may be slightly loosened so that by shifting the arm or projeotion 17 the coil may be rotated within its bearing to advance or retard the spark.

Of course it will be understood that various modifications may be made without departing from the spirit of the invention as claimed.

I claim:

1. In combination with an induction coil,-

a core movable independently of the coils thereof and a circuit breaking attachment, said attachment having a movable part adapted to be operated by said core.

2. In combination with an induction coil, a rotatable core therefor and a circuit breaking attachment, said attachment having a revolving contacting member mounted upon said core. 1

3. In combination with an induction coil, a core movable independently of the coils thereof comprising soft iron wires within a metallic tube having a longitudinal cut away portion, and a timer at one end of said coil having its rotatable member mounted upon said core.

4. In combination with an induction coil,

a rotatable core therefor comprising soft 1 iron wires within a metallic tube having a longitudinal cut away portion, and a timer at one end of said coil having its rotatable member mounted upon said core, said coil having a central longitudinal bearing for said core.

5. In combination with a stationary induction coil, a rotatable core therefor comprising soft iron wires within a metallic tube having a longitudinal cut away portion, a timer at one end of said stationary coil having its rotatable member mounted upon said core, and a condenser concentrically mounted outside of the secondary windings of said coil.

6. In combination with an induction coil, a core movable independently of the coils thereof, and means co-acting therewith for periodically affecting the current therein.

7. In combination with an induction coil, a rotatable core therefor comprising soft iron wires within a metallic tube having a longitudinal cut away portion, a circuit breaker in the primary circuit of said coil having a resilient arm maintaining said circuit normally upon and means in combination with said rotatable core for closing said circuit through said resilient arm.

8. In combination with a stationary induc tion coil, a rotatable core therefor comprising soft iron wires within a metallic tube having a longitudinal cut awayportion, a circuit breaker in the primary circuit of said stationary coil having a resilient arm maintaining said circuit normally upon and means in combination with said rotatable core for closing said circuit through said resilient arm, and also means for causing said resilient arm to open said circuit when it fails to act by its own resiliency.

In testimony whereof I afiix my signature in presence of two witnesses.

JOSEPH H. LEHMAN. Witnesses:

LOUISE ENDERLE, THOMAS A. HILL. 

